Short-circuit grounding wire device

Abstract

The invention discloses a short-circuit grounding wire device, and relates to the technical field of power equipment. The wire clamp comprises a main body integrally formed by conductive metal, a second clamping block, an ejector rod and a self-locking assembly. An arc-shaped groove is formed in the middle of a first clamping block of the main body, a second clamping block is rotationally connected with the first clamping block through a plug pin, a middle bent part and the groove form a clamping area, a first protrusion is arranged on the upper portion of the groove, a second protrusion is arranged at the lower end of the bent part, and the first protrusion and the second protrusion apply vertical clamping force to a cable. The ejector rod is screwed into the connecting part through threads to push the second clamping block to rotate so as to reduce the volume of the clamping area. The self-locking assembly comprises a sliding groove and a self-locking block, the self-locking block and the ejector rod form friction self-locking after being extruded by the abutting part, and loosening is prevented. Furthermore, the inclined design of the sliding groove enables the self-locking block to have a gravity reset function. By means of protrusion matching, a self-locking mechanism and a dynamic adjusting structure, the problems that a traditional wire clamp is insufficient in clamping force, tedious in operation and prone to loosening are solved, and the safety and efficiency of high-altitude operation are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grounding wire clamps, and particularly relates to a short - circuit grounding wire device. Background Art

[0002] In the high - altitude operation of overhead lines in the power system, the short - circuit grounding wire device is a key tool to ensure operation safety, which is used to firmly clamp the cable and form a reliable grounding loop. Most traditional grounding wire clamps adopt bolt fastening or simple lever structures, and have the following deficiencies:

[0003] Insufficient clamping force: Traditional structures rely on manual tightening of bolts, and the clamping force is easily affected by operations. Moreover, it is prone to loosening after long - term use, posing a safety hazard;

[0004] Complicated operation: During high - altitude operations, repeatedly adjusting bolts or levers is time - consuming and laborious, affecting work efficiency;

[0005] Poor adaptability: It is difficult to adapt to the clamping requirements of cables with different diameters, easily resulting in poor contact;

[0006] Lack of self - locking mechanism: Existing wire clamps generally lack anti - back - off designs and are prone to loosening under vibration or external forces.

[0007] In view of the above problems, there is an urgent need for a new type of short - circuit grounding wire device with high clamping force, convenient operation, stable self - locking and strong adaptability. Summary of the Invention

[0008] (1) Technical Problems to be Solved

[0009] To solve the above problems, the present invention proposes a short - circuit grounding wire device, aiming to solve the problems of insufficient clamping force, complicated operation, poor adaptability and lack of self - locking mechanism in the existing short - circuit grounding wire device.

[0010] (2) Technical Solutions

[0011] A short - circuit grounding wire device of the present invention, the short - circuit grounding wire device includes:

[0012] A main body, including a connecting portion and a first clamp block cooperating with a second clamp block, the first clamp block is in contact connection with the connecting portion, and the main body is made of conductive metal material;

[0013] A second clamp block, one end of which is rotatably connected to the end of the first clamp block to form a clamping area for clamping the cable;

[0014] A push rod, passing through one end of the connecting portion and abutting against the second clamp block to clamp the cable in cooperation;

[0015] A groove with an arc-shaped structure is provided in the middle of the first clamping block, and a bent portion is provided in the middle of the second clamping block. The groove and the bent portion cooperate to form the clamping area. A first protrusion is provided on the upper portion of the groove, and a second protrusion is provided on the lower portion of the bent portion. When the short-circuit grounding device clamps the cable, the first protrusion and the second protrusion abut against the cable and exert upward and downward interaction forces respectively.

[0016] A yield area is provided at the lower portion of the first clamping block, and a contact portion protruding into the yield area is provided at the lower portion of the second clamping block. When the short-circuit grounding wire device clamps the cable, the contact portion is located in the yield area, and the push rod moves upward to support one end of the second clamping block, driving the contact portion to move into the yield area. The more the contact portion enters the yield area, the smaller the volume of the clamping area.

[0017] In the present invention, a self-locking block and a sliding groove for accommodating the self-locking block are further provided in the main body, and a through groove for accommodating the push rod is provided on the connecting part. One end of the sliding groove is connected with the through groove, and the other end is connected with the yield area. One end of the self-locking block is arranged in the yield area, and the push rod moves upward, driving the abutment part to rotate into the yield area. During the rotation process, the abutment part supports the self-locking block and abuts against the push rod to form a self-locking structure.

[0018] In the present invention, a spring-locking portion is provided at one end of the self-locking block for providing a reset force for the self-locking block, and the spring-locking portion is located in the yielding area.

[0019] In the present invention, the slide groove is an oblique groove structure, and the height of the slide groove close to the through groove is greater than the height of the slide groove close to the yield area.

[0020] In the present invention, one end of the self-locking block can support the push rod through the action of the abutment portion, a connecting thread is provided in the through groove, and an external thread matching the connecting thread is provided on the upper part of the push rod.

[0021] In the present invention, both sides of the second clamping block are further provided with:

[0022] a first flange, located at the clamping area, for increasing the contact area between the first clamping block and the cable;

[0023] The second flange is located at the abutting portion and is used to cooperate with the self-locking block.

[0024] In the present invention, an arc-shaped contact surface is further provided at one end of the second clamping block that cooperates with the push rod, so as to reduce the contact friction between the first clamping block and the push rod.

[0025] In the present invention, the end of the connecting portion away from the first clamping block is further provided with a socket for connecting a ground wire and an insert for fixing the ground wire, and the insert and the socket are arranged perpendicular to each other.

[0026] In the present invention, two shifting rods are arranged opposite to each other at the lower part of the push rod.

[0027] In the present invention, the connecting portion and the first clamping block are an integrated structure.

[0028] (III) Beneficial effects

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) In the present invention, the second clamping block is driven to rotate by the push rod, and the coordination between the groove and the bending part, as well as the vertical clamping force of the first protrusion and the second protrusion, significantly improves the clamping stability; the design of the self-locking block and the spring-locking part forms friction self-locking, preventing the push rod from retreating and ensuring that the wire clamp is tightened for a long time.

[0031] (2) The cooperation between the push rod and the arc-shaped contact surface in the present invention greatly reduces friction. Combined with the lever design, clamping can be completed by simply rotating the push rod during operation, making high-altitude operations more convenient.

[0032] (3) The dynamic coordination between the bending part and the clearance area can automatically adjust the volume of the clamping area to adapt to different cable diameters; the spring lock part provides buffer deformation to further accommodate size differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the short-circuit grounding wire device;

[0035] Figure 2 Schematic diagram of the connection structure between the main body and the second clamping block;

[0036] Figure 3 is a schematic diagram of the three-dimensional structure of the second clamping block;

[0037] Figure 4 Schematic diagram of the connection structure between the main body and the self-locking block;

[0038] Figure 5 Schematic diagram of the cross-sectional structure of the main body from a top view;

[0039] Figure 6 Schematic diagram of the front cross-sectional structure of the main body;

[0040] Figure 7 It is a schematic diagram of the three-dimensional structure of the self-locking block.

[0041] 10. Main body, 101. Connecting part, 1011. Through groove, 1012. Slide groove, 102. First clamping block, 1021. Boss, 1022. Clamping area, 1023. Yield area, 1024. Groove, 1025. Second protrusion, 1026. First groove edge, 1027. Groove bottom, 1028. Second groove edge, 20. Second clamping block, 201. Bending part, 202. First protrusion, 203. First flange, 204. Second flange, 205. Arc-shaped contact surface, 206. Abutting part, 30. Self-locking block, 31. Spring-locking part, 40. Latch, 50. Push rod, 51. Push rod. DETAILED DESCRIPTION

[0042] Example 1

[0043] like Figure 1 The illustrated short-circuit grounding device, or short-circuit grounding clamp, comprises a main body 10, a second clamping block 20, and a top rod 50. In this embodiment, the main body 10 is composed of an integrally formed connecting portion 101 and a first clamping block 102. An arc-shaped groove 1024 is provided in the center of the first clamping block 102. Specifically, the connecting portion 101 and the first clamping block 102 are integrally formed and are both constructed of conductive metal materials, such as iron, silver, aluminum, or copper. Groove 1024 is provided in the center of the first clamping block 102. The second clamping block 20 is pivotally mounted to the end of the first clamping block 102 via one end of a latch 40. A bent portion 201 is provided in the center of the second clamping block 20, interacting with the groove 1024 to form a clamping area 1022 for clamping the cable.

[0044] Reference Figures 2 - 3 Two vertically upward protrusions 1021 are provided on the top of the first clamping block 102. The protrusions 1021 do not contact each other to form a gap for accommodating one end of the second clamping block 20. One end of the second clamping block 20 is arranged in the gap and is rotated together with the second clamping block 20 through a pin shaft passing through the protrusions 1021.

[0045] The front bottom surface of the second clamping block 20 is also provided with a curved contact surface 205 that mates with the push rod 50. The push rod 50 passes through the connecting portion 101 and abuts against the curved contact surface 205. As the push rod 50 continues to move upward, it can support the clockwise rotation of the second clamping block 20, thereby continuously reducing the volume of the clamping area 1022 to clamp the cable. The design of the curved contact surface 205 is designed to significantly reduce the contact friction between the top surface of the push rod 50 and the curved contact surface 205, thereby reducing the effort required during high-altitude operations.

[0046] Reference Figures 4 - 5 The bent portion 201 is recessed inward, and a second protrusion 1025 is provided at the lower end of the bent portion 201. In this embodiment, the second protrusion 1025 is a semicircular cylindrical structure. The upper portion of the groove 1024 is located below the protrusion 1021. Specifically, the groove 1024 includes a first groove edge 1026, a groove bottom 1027, and a second groove edge 1028. One end of the first groove edge 1026 extends to the lower portion of the protrusion 1021. In particular, the slope of the first groove edge 1026 is smaller than that of the second groove edge 1028, thereby limiting the bottom of the cable and providing a contact surface.

[0047] A clearance area 1023 is further defined at the lower portion of the first clamping block 102, while an abutment portion 206 is defined at the lower portion of the second clamping block 20, recessed in the opposite direction of the bent portion 201. When the first clamping block 102 and the second clamping block 20 are connected and the ejector rod 50 is not in contact with the front end of the second clamping block 20, the abutment portion 206 is located within or above the clearance area 1023. As the second clamping block 20 rotates clockwise, the abutment portion 206 continuously sinks into the clearance area 1023, thereby continuously reducing the volume of the clamping area 1022.

[0048] Specifically, a first protrusion 202 is further provided at the lower portion of the bent portion 201. The first protrusion 202 is located near the second groove edge 1028. In this embodiment, two second protrusions 1025 are provided, one on each side above the first protrusion 202. The first protrusion 202 and the second protrusion 1025 are arranged in a triangular shape. When clamping a cable, the top and bottom of the cable are tangent to the second protrusion 1025 and the first protrusion 202, respectively. The first protrusion 202 and the second protrusion 1025 apply a vertical clamping force to the cable, further clamping it and preventing it from loosening.

[0049] The second clamping block 20 is further provided with a first flange 203 and a second flange 204 on either side. The first flange 203 is located on either side of the bend 201 and within the clamping area 1022. It primarily serves to increase the contact area of the second clamping block 20 with the cable, thereby increasing the length of the first protrusion 202 and providing stability for the cable clamping. The second flange 204 is positioned at the abutment portion 206 and primarily cooperates with the self-locking block 30 positioned within the clearance area 1023. This self-locking block 30 is used to apply a horizontal force to the push rod 50, preventing its axial rotation and causing the cable clamp to loosen. In this embodiment, the first flange 203 and the second flange 204 are interconnected.

[0050] Further, refer to Figures 3 - 4, a slide groove 1012 for accommodating the self-locking block 30 is also provided in the main body 10. The self-locking block 30 is accommodated in the slide groove 1012 of the main body 10. One end of the slide groove 1012 is connected to the through groove 1011, and the other end extends to the yield area 1023 of the first clamping block 102. A spring-locking portion 31 is provided at one end of the self-locking block 30 near the yield area 1023. The spring-locking portion 31 is made of a highly elastic stainless steel sheet and is bent in multiple sections. It is used to provide a reset force for the second clamping block 20 while providing a buffer deformation process for the abutment 206. In other words, it prevents the horizontal force of the self-locking block 30 on the top rod 50 from being affected by different cable diameters. It should be noted that as the top rod 50 moves upward, the force between the abutment 206 and the self-locking block 30 also increases.

[0051] The chute 1012 is also provided with a retaining wall to prevent the self-locking block 30 from falling out. The retaining wall is arranged in abutment with the self-locking block 30. In this embodiment, the spring-locking portion 31 and the self-locking block 30 are an integrated structure. The through-slot 1011 is provided with a connecting thread, and the outer portion of the push rod 50 is provided with an external thread that mates with the connecting thread. In other words, the push rod 50 is able to move upward through the through-slot 1011 by rotation. The push rod 50 and the self-locking block 30 form a self-locking structure.

[0052] When the push rod 50 is screwed, its external thread engages with the internal thread of the through groove 1011, driving the push rod 50 upward. The end of the push rod 50 pushes the abutment portion 206 of the second clamping block 20 toward the yield area 1023. At this time, the bent portion 201 of the second clamping block 20 engages with the groove 1024 of the first clamping block 102, and the first protrusion 202 and the second protrusion 1025 apply a clamping force up and down on the cable. As the abutment portion 206 penetrates into the yield area 1023, the self-locking block 30 is squeezed by the abutment portion 206 and slides along the slide groove 1012 toward the through groove 1011 until the front end of the self-locking block 30 abuts the outer wall of the push rod 50. At this time, the elastic reset force of the spring lock portion 31 forces the self-locking block 30 to cling to the push rod 50, forming a frictional self-locking force, preventing the push rod 50 from retreating.

[0053] To facilitate the rotation of the push rod 50, two opposing levers 51 are provided at the bottom of the push rod 50, extending horizontally to either side. The end of the connecting portion 101 away from the first clamping block 102 also has a socket for connecting a ground wire and a plug for securing the ground wire, with the plug and the socket positioned perpendicularly to each other.

[0054] Example 2

[0055] Reference Figures 6 - 7As shown, based on Example 1, the slide groove 1012 has an inclined structure, that is, the height of the slide groove 1012 at one end of the through groove 1011 is greater than the height at the end of the clearance area 1023. Correspondingly, the end of the self-locking block 30 that abuts the ejector pin 50 is also inclined, thereby forming a tangent surface with the side surface of the ejector pin 50. The inclined arrangement of the slide groove 1012 allows the self-locking block 30 to slide downward and reset under the action of its own weight even if the spring-locking portion 31 is absent or fails.

[0056] It should be noted that the slope of the inclined surface at the front end of the self-locking block 30 is related to the slope of the sliding groove.

[0057] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements made to the technical solution of the present invention by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content for which protection is sought in the present invention is fully set forth in the claims.

Claims

1. A short-circuit grounding wire device, characterized in that: The short-circuit grounding wire device comprises: A main body, comprising a connecting portion and a first clamping block cooperating with a second clamping block, wherein the first clamping block and the connecting portion are in contact and connected with each other, and the main body is made of a conductive metal material; A second clamping block, one end of which is rotatably connected to the end of the first clamping block to form a clamping area for clamping cables; a push rod passing through one end of the connecting portion and abutting against the second clamping block to clamp the cable; A groove with an arc-shaped structure is provided in the middle of the first clamping block, and a bent portion is provided in the middle of the second clamping block. The groove and the bent portion cooperate to form the clamping area. A first protrusion is provided on the upper portion of the groove, and a second protrusion is provided on the lower portion of the bent portion. When the short-circuit grounding device clamps the cable, the first protrusion and the second protrusion abut against the cable and exert upward and downward interaction forces respectively. A yield area is provided at the lower portion of the first clamping block, and a contact portion protruding into the yield area is provided at the lower portion of the second clamping block. When the short-circuit grounding wire device clamps the cable, the contact portion is located in the yield area, and the push rod moves upward to support one end of the second clamping block, driving the contact portion to move into the yield area. The more the contact portion enters the yield area, the smaller the volume of the clamping area.

2. The short-circuit grounding wire device according to claim 1, characterized in that: A self-locking block and a sliding groove for accommodating the self-locking block are also provided in the main body. A through groove for accommodating the push rod is provided on the connecting part. One end of the sliding groove is connected with the through groove, and the other end is connected with the yield area. One end of the self-locking block is arranged in the yield area. The push rod moves upward, driving the abutment part to rotate into the yield area. During the rotation process, the abutment part supports the self-locking block and abuts against the push rod to form a self-locking structure.

3. The short-circuit grounding wire device according to claim 2, characterized in that: One end of the self-locking block is provided with a spring-locking portion for providing a reset force for the self-locking block, and the spring-locking portion is located in the yielding area.

4. The short-circuit grounding wire device according to claim 2, characterized in that The chute is an oblique chute structure, and the height of the chute close to the through slot is greater than the height of the chute close to the yield area.

5. The short-circuit grounding wire device according to claim 3 or 4, characterized in that, One end of the self-locking block can support the push rod through the action of the abutting portion, a connecting thread is provided in the through groove, and an external thread that cooperates with the connecting thread is provided on the upper part of the push rod.

6. The short-circuit grounding wire device according to claim 5, characterized in that: The two sides of the second clamping block are also provided with: a first flange, located at the clamping area, for increasing the contact area between the first clamping block and the cable; The second flange is located at the abutting portion and is used to cooperate with the self-locking block.

7. The short-circuit grounding wire device according to claim 6, characterized in that, An arc-shaped contact surface is further provided on one end of the second clamping block that cooperates with the push rod, so as to reduce the contact friction between the first clamping block and the push rod.

8. The short-circuit grounding wire device according to claim 7, characterized in that The end of the connecting portion away from the first clamping block is further provided with a socket for connecting a ground wire and an insert for fixing the ground wire, and the insert and the socket are arranged perpendicular to each other.

9. The short-circuit grounding wire device according to claim 8, characterized in that: The lower part of the top rod is provided with two shifting rods which are arranged opposite to each other.

10. The short-circuit grounding wire device according to claim 9, characterized in that, The connecting portion and the first clamping block are an integrated structure.

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